HR: 08:00h
AN: SA51C-01 INVITED     [Abstracts]
TI: The Emergence of a Pattern of Global Change in the Upper Atmosphere and Ionosphere
AU: * Lastovicka, J
EM: jla@ufa.cas.cz
AF: Institute of Atmospheric Physics, Bocni II, Prague, 14131, Czech Republic
AU: Akmaev, R A
EM: Rashid.Akmaev@noaa.gov
AF: CIRES, Univ. of Colorado, Broadway 325, Boulder, CO 80309, United States
AU: Beig, G
EM: beig@tropmet.res.in
AF: Indian Institute of Tropical Meteorology, Bhabha Road, Pune, 411-008, India
AU: bremer, J
EM: bremer@iap-kborn.de
AF: Leibnitz-Inst. of Atmospheric Physics, Schloss-Street 6, Kuehlungsborn, D-18225, Germany
AU: Emmert, J T
EM: john.emmert@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, United States
AU: Jacobi, C
EM: jacobi@uni-leipzig.de
AF: Institute of Meteorology, Univ. of Leipzig, Stephanstr. 3, Leipzig, 04103, Germany
AU: Jarvis, M J
EM: m.jarvis@bas.ac.uk
AF: British Antarctic Survey, Madingley Road, Cambridge, CB3 0ET, United Kingdom
AU: Nedoluha, G
EM: nedoluha@nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, United States
AU: Portnyagin, Y I
EM: yportgin@typhoon.obninsk.ru
AF: Institute for Experimental Meteorology, Lenin Str. 82, Obninsk, 249038, Russian Federation
AU: Ulich, T
EM: thu@sgo.fi
AF: Sodankyla geophysical Observatory, Tahtalantie 62, Sodankyla, FIN-99600, Finland
AB: In the upper atmosphere, greenhouse gases produce a cooling effect, instead of a warming effect. Increases in greenhouse gas concentrations are expected to induce substantial changes in the mesosphere, thermosphere, and ionosphere, including a thermal contraction of these layers. Here we present the first global pattern of the observed long-term change in the upper atmosphere and ionosphere, based on trend studies of various parameters. The picture we obtained is qualitative, and contains several gaps and a few discrepancies, but the overall pattern of observed long-term changes throughout the upper atmosphere is mutually consistent and qualitatively consistent with model predictions of the effect of greenhouse gas increases. The upper atmosphere as a whole is cooling and contracting, and changes in temperature and related changes in minor constituents are responsible for changes of the ionosphere. Together with the large body of lower atmospheric trend research, our synthesis indicates that anthropogenic emissions of greenhouse gases are affecting the atmosphere at nearly all altitudes between ground and space.
DE: 0340 Middle atmosphere: composition and chemistry
DE: 1610 Atmosphere (0315, 0325)
DE: 1630 Impacts of global change (1225)
DE: 2400 IONOSPHERE (6929)
SC: SPA-Aeronomy [SA]
MN: 2007 Joint Assembly